Dental pliers for adjusting tools in hand-pieces



W, A. JOHNSTON sa LW. BROWNB. DENTAL PLIERS FOR ADJUSTING TOOLS I'NHAND PIECES. No. 319,584. Patented June 9, 1835.

(No ModeL) ma@ ,m

UNITED STATES PATENT OFFICE.

WILLIAM A. JOHNSTON, OF CLIFTON, AND ARTHUR W. BROWN E, OF WEST- FIELD, NEW YORK, ASSIGNORS TO THE S. S. WHITE DENTAL MANU-- FACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

DENTAL PLIERS FOR ADJUSTING TOOLS IN HAND-PIECES.

SPECIFICATION forming part of Letters Patent No. 319,584, dated June 9, 1885-.

Application filed April 19, 1884. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM A. JOHN- sToN, of the village of Clifton, in the county of Richmond and State of New York, and

ARTHUR W. BROWNE, of the village of Westfield, in said county and State, have jointly invented certain new and useful Improvements in Dental Pliers for Adjusting Tools in Hand-Pieces, of which the following is a speciiication.

The improvements claimed herein relate more particularly to a tool or device for inserting and forcing the operating-tools into and removing them from the tool-holders of I5 what are known as angle attachments7 for use in connection with the hand-pieces of dental engines.

The object of our vinvention is to provide an improved instrument or device for the purposes mentioned, and designed for use more particularly with tool-holders so organized as to receive and drive operating-tools from either side, and the tools depending for their driving-connection with the socket of the tool- 2 5 holder upon friction alone. In such toolholder it is necessary to wedge or force the tool-Shanks tightly into the socket of the toolholder, so as tdsecure a firm driving-connection, and to attain this end rapidly and with 3o ease to the operator, and further to provide for the easy l,removal of the operating-tools from the tool-holder, We have devised the improved instrument or device which forms the subject-matter of this present application.

The subject-matter claimed is particularly recited at the close of the specification, and some of our improvements so claimed may be used without the others.

In the accompanying drawings we have 4o shown our improvements as organized for 0peration in connection with an angle attachment of our invention, for which an application was led January 30, 1884, No. 119,212. Our improvements may, however, be used in connection with other forms of tool-holders and angle attachments, and in any connection in which they may be useful.

We do not claim herein any part of the angle attachment which We have particularly shown and described in illustrating the operation of 5o our improved implement or device, such being the subject-matter of our aforesaid application filed January 30, 1884.. This present application is filed as a division and continuation of said application, in which our improved tool setting and removing implement or device is shown jand described, but disclaimed in favor of this present case.'

In said drawings, Figure 1 is a view in elevation of the attachment, and Fig. 2 :a longitudinal section thereof. Fig. 3 is a sectional view of a pair of forceps or pliers organized for the purpose of inserting and securing the tools in the angle attachments, and of removing them from the tool-holder thereof. Fig. 4 is a plan of said forceps, and Figs. 5 and 6 illustrate,respectivelygthe manner of removing the shank of the bit or tool from the toolholder of the attachment, and of inserting the shank of the tool in such tool-holder.`

The angle attachment shown in the accompanying drawings consists, as usual, of a barrel or tube, A, a driving-shaft, B,iitted to turn in said barrel or tube, and carrying the pinion C at its front end, and ahead,D,connected with said barrel or tube, and iitted with bearings for a tool-holder, F, havinga rigidly-connected gear-wheel, f, meshing with and being driven by the pinion C of the driving-shaft B. The head Dis of peculiar construction,and is connected with the barrel or tube A by a peculiarly-constructed shank, d; but as these peculiarities of construction of the attachment do not form part of the subject-matter claimed herein they need not be more fully described. 8 5

The tool-holder F is a tubular spindle open at'both ends, or has its opening extending through it, and this opening is preferably a double-tapered opening, as shown in Figs. 2, 5, and 6.

The bits or tools to be insertedin and driven by the tool-holder F of the attachment are preferably constructed `as clearly shown in Figs. 2, 5, and -that is to say, with a tapering or wedge shank, g, an enlargement or shoulder, 95 gf, and an operating end, g2. The shanks of Inorderto provide for the ready insertion? aud removal of, the bitsor` tools fromthetoolholder of the attachmeutfl have organied a, pair of pliers or'forceps, orfa'd'evi-cehaving" twof jaws, as shown in Figs. 3, 4, 5, and 6, onejaw or beakthereof-having y a'punch or plungeryh, rigidly"attached` thereto','wl`1le the opposite jaw or beak is slotted, as at h,the slot terminatingvin an enlargedrecessghwhieh recess is large enough to permit the passage through it of the shoulder g and shank of the t0ol,while the slot h permits the passage between it of" thereduced .por-tiomof.: thetool in front .of its# shaulder g, :while itismuof sufficient widthy to permit of ,thepassage through it of said 'en-`- largement-g. and the-.shanlcof thevtool;

' In o der .tofinsert-and' locka bit or tool thetool-,holder ofthe attachment the head Vof ,1 t'heattachment is passed between the outer ends of thelforceps, with' the 'endof thebeak or Y jaw' carrying the .pluugerh bearing iuponthev upper end of sai.drhead,..while thetool isiin sertedinthe tool-holderandpassed with its reduced porti-on'` in lfront of itsshoulder ginto the slot in the opposite jawor healcof the for#l v ceps, as showninFig. 6g By forcingthe-han'- dlesfofthe forceps together. it will n'owbe obviousthatthe tapered orwedge-shaped sh ank of ,y they-tool will be fOrCedrm-lyinto the socketA of thetoo'lholdery F, and will be securely-locked therein, so that. when .driven in operation firm g connection ,with'thet tool is hadn'V Inforder to remove the tool from the toolholder F the head of the attachment is passed i between the'jawsto a'greatei" extent than be"- fore, and sufcientl y far to permitthe entrance of the plunger'Ii/,into the'.v upperend of the holder F, and to bring the enlargement g of the tool in the enlarged recess h'l of the opposite jaw. It will be obvious nowT that in closing the handles of the forceps the plunger: orpunch h will force th'ebit or tool out ofthe tool-holder, its escape being permittedthrou gh the, recess I. of the opposite jaw,which,jaw af- 'fordsa bearing'for the lower end of the toolholder. lt will thus be seen that the operatingj-toolszof the attachment may be readily inserted in and are removed from the tool-holder, as desired, while in operation a firm drivingconnection is had.= i i y jAs we have stated before, we do not claim herein the particular improvements in toolcarriers or angle attachments and in operat-l afores'aid'- application of J anua'ry 30, What vwe do claimherei'n is`- c 1.. An implement.'havingtwo jaws ingtools therefor yshown or described;herein, -as'fthey-constitute the subject-matter of our 1884 butj' or bealis, f

i one jaw of which isprovided with aplu'nger-or' punch, andthe other jaw ofwhieh is'provided with la 4slotv havirign enlargement or're'lcess 1 in aportion of its length', substantially as Escribed, whereby the insertion in and removal of tools from a toolfholder may bejfacjlitate'd,

'-substantiallyas described. l. y l 2.1The implement consisting of two jaws,`

one ofwhic'h is provided 'witha's'lot having an enlarge/mentor' recessgin a portion 'substantially 'as described. 4

srribedfournames; A

In testimony whereof we have hereunto sub` a WILLIAM A.; JoliNsrolvfif,

ARTHUR :,W. RoWNE-- 

